<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <!-- <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script> -->
</head>

<body>
    <div id="app">
         <h1>今天天气很{{weather}}</h1>
         <button @click="change">切换天气</button>
    </div>

    <script>

    </script>
</body>

</html>